I am going to have to buy a couple more copies of this book. I keep loaning it out to friends who end up liking it so much that they conveniently can't find it when I start asking for it back.
Myself, I found the book to be a little short, and at times wishing there was more depth to some of the subjects. However, the information in the chapters that it does contain already improve my quality of life. The part that I found the most helpful is the section on sleep patterns. Get the book for the sleep chapter alone, you will thank yourself for it later! Then you can read the rest, as there are many other chapters of interest and usefulness as well.
Whether you use this book as a reference or read it cover to cover, The Owner's Manual for the Brain is a great book to have around. From describing the most basic fundamentals of how the human brain functions to analyzing the latest research in various fields of psychology, the author presents each topic in an easy to understand manner that is enjoyable to read as it is informative.
The best part of this book is that every sub-chapter includes a list of "applications" for what you have just read. This elevates the book from the simple listing of facts to an extremely usable tool. I would dare anyone to read this book and not come away with at least one application that could not vastly improve their life. Time with this book is time well spent.